塔河油田S75井区卡拉沙依组沉积特征与演化
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摘要
根据岩芯、测井和地震等资料,在塔河油田S75井区识别出陆架型扇三角洲、潮坪以及碳酸盐岩台地3种沉积相。其中石炭系底部的巴楚组双峰灰岩为碳酸盐岩台地,卡拉沙依组上泥岩段为潮坪相,砂泥岩段底部为陆架型扇三角洲沉积,砂泥岩段上部为潮坪和扇三角洲相沉积。应用经典层序地层学将卡拉沙依组划分为3个三级层序(Csq1,Csq2和Csq3),每个层序又识别出了高位体系域、海侵体系域和低位体系域。进行7口单井的层序划分,依据准层序划分结果将卡拉沙依组划分为17个小层。以等时层序地层格架为基础进行沉积演化研究,从巴楚组的碳酸盐岩台地相开始,受构造运动和海平面升降的影响,卡拉沙依组沉积经历了潮坪—陆架型扇三角洲前缘—潮坪—扇三角洲平原的沉积演化过程。
According to core,logging and seismic data,shelf-type fan delta,tidal flat and carbonate platform facies were identified in S75 Well Field of the Tahe Oilfield.Bachu Formation which peaks at the bottom of the Carboniferous bimodal limestone was carbonate platform,the upper clay-stone section of Kalashayi Formation was tidal flat facies,the bottom of the sand shale section was shelf-type fan delta deposition,and the upper of sand shale section was tidal flat and fan delta facies.On the basis of classic sequence stratigraphy,Kalashayi Formation was divided into three third order sequences(Csq1,Csq2,Csq3),and each sequence has identified highstand systems tract(HST),transgressive systems tract(TST) and lowstand systems tract(LST).The sequence of seven single wells was identified.On the basis of parasequence results,Kalashayi Formation was divided into 17 sublayers.The evolution of sedimentary was studied on the basis of isochronous sequence stratigraphic framework.From the beginning of the carbonate platform of Bachu Formation,Kalashayi Formation experienced sedimentary evolution of tidal flat—shelf-type fan delta front—tidal flat— fan delta plain under the influence of tectonic movement and the sea level change.
According to core,logging and seismic data,shelf-type fan delta,tidal flat and carbonate platform facies were identified in S75 Well Field of the Tahe Oilfield.Bachu Formation which peaks at the bottom of the Carboniferous bimodal limestone was carbonate platform,the upper clay-stone section of Kalashayi Formation was tidal flat facies,the bottom of the sand shale section was shelf-type fan delta deposition,and the upper of sand shale section was tidal flat and fan delta facies.On the basis of classic sequence stratigraphy,Kalashayi Formation was divided into three third order sequences(Csq1,Csq2,Csq3),and each sequence has identified highstand systems tract(HST),transgressive systems tract(TST) and lowstand systems tract(LST).The sequence of seven single wells was identified.On the basis of parasequence results,Kalashayi Formation was divided into 17 sublayers.The evolution of sedimentary was studied on the basis of isochronous sequence stratigraphic framework.From the beginning of the carbonate platform of Bachu Formation,Kalashayi Formation experienced sedimentary evolution of tidal flat—shelf-type fan delta front—tidal flat— fan delta plain under the influence of tectonic movement and the sea level change.
引文
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[12]李永宏,阎相宾,张涛,等.塔河油田石炭系卡拉沙依组储层特征及控制因素[J].石油实验地质,2004,26(1):17-27.LI Yonghong,YAN Xiangbin,ZHANG Tao,et al.Reservoir characteristics and their controlling factors of the Carboniferous Kalashayi Formation in Tahe Oilfield[J].Petroleum Geology&Experiment,2004,26(1):17-27.
[2]郭齐军,赵省民.塔河地区石炭系沉积特征[J].石油与天然气地质,2002,23(1):99-102.GUO Qijun,ZHAO Xingmin.Depositional characteristics of Carboniferous in Tahe Region[J].Oil&Gas Geology,2002,23(1):99-102.
[3]何发岐,翟晓先,俞仁连,等.塔河油田石炭系卡拉沙依组沉积与成因分析[J].石油与天然气地质,2004,25(3):258-262.HE Faqi,ZHAI Xiaoxian,YU Renlian,et al.Deposition and genetic analysis of Carboniferous Kalashayi Formation in Tahe oilfield[J].Oil&Gas Geology,2004,25(3):258-262.
[4]刘辰生,郭建华,苏娟.塔里木盆地阿克库勒地区石炭系卡拉沙依组成岩作用[J].新疆地质,2005,23(3):288-291.LIU Chensheng,GUO Jianhua,SU Juan.Digenesis of Kalashayi Formation,Carboniferous,Akekule Area,Tarim Basin[J].XinJiang Geology,2005,23(3):288-291.
[5]Nemec W,Steel R J.Fan deltas:Sedimentology and tectonic settings[M].Berkeley:Blackie,1988:3-13.
[6]唐海发,贾爱林,彭仕宓,等.洪积扇相储层沉积微相-岩石相随机模拟[J].中国石油大学学报:自然科学版,2010,34(3):12-17.TANG Haifa,JIA Ailin,PENG Shimi,et al.Stochastic modeling of sedimentary microfacies-lithofacies in proluvial fan reservoir[J].Journal of China University of Petroleum:Natural Science,2010,34(3):12-17.
[7]阎相宾,李永宏.塔河油田石炭系砂层划分对比与横向预测[J].勘探地球物理进展,2002,25(5):36-51.YAN Xiangbin,LI Yonghong.Division and lateral prediction of Carboniferous and in Tahe oilfield[J].Progress in Exploration Geophysics,2002,25(5):36-51.
[8]盛湘,何发岐,云露.塔河地区卡拉沙依组小层划分、连通性及油藏类型[J].石油与天然气地质,2009,30(2):143-148.SHENG Xiang,HE Faqi,YUN Lou.Subzone division,Connectivity and pool types of the Carboniferous Kalashayi Formation in the Tahe area[J].Oil&Gas Geology,2009,30(2):143-148.
[9]郭建华,孙磉墩,许杰,等.塔里木盆地巴楚地区石炭系层序地层学研究[J].中南大学学报:自然科学版,2010,41(1):257-264.GUO Jianhua,SUN Sangdun,XU Jie,et al.Sequence Stratigraphy of Carboniferous at Bachu area,Tarim Basin[J].Journal of Central South University:Science and Technology,2010,41(1):257-264.
[10]许杰,何治亮,郭建华,等.塔里木盆地及周缘晚泥盆世沉积演化[J].石油实验地质,2008,30(6):568-574.XU Jie,HE Zhiliang,GUO Jianhua,et al.Late Devonian sedimentary evolution in the Tarim Basin and its margins[J].Petroleum Geology&Experiment,2008,30(6):568-574.
[11]朱如凯,罗平,罗忠.塔里木盆地晚泥盆世及石炭纪岩相古地理[J].古地理学报,2002,4(1):13-24.ZHU Rukai,LUO Ping,LUO Zhong.Lithofacies palaeography of the Late Devonian and Carboniferous in Tarim Basin[J].Journal of Palaeogeography,2002,4(1):13-24.
[12]李永宏,阎相宾,张涛,等.塔河油田石炭系卡拉沙依组储层特征及控制因素[J].石油实验地质,2004,26(1):17-27.LI Yonghong,YAN Xiangbin,ZHANG Tao,et al.Reservoir characteristics and their controlling factors of the Carboniferous Kalashayi Formation in Tahe Oilfield[J].Petroleum Geology&Experiment,2004,26(1):17-27.
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